Experiences on the Shortwaves

09/11/2015 14:51

6GK6/6146B MOPA

Perhaps it's easier to think to a good 6146 as Radio Frequency power amplifier, than any other tube, both meant for Radio Frequency or borrowed from other applications like Audio or Cathode Ray Tube sweep driver.

The 6146 needs a drive power level which is halfway between the 6DQ6 and the 807. The minimum required control grid drive current is 2.5 mA, which begins to make crytical the operation on all the Shortwaves with a frequency quadrupling oscillator. Besides, the 6146 are very delicate tubes and can be damaged easily by overloads. So, this schematic is for the expert operator.